Results 1 to 7 of 7
  1. #1
    Member
    Join Date
    Jan 2007
    Posts
    44
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default Shadow Copies and TSM

    I want to enable Shadow Copies on some of my shares that are being backed up by TSM.

    I know TSM uses VSS. Would enabling Shodow Copy interfer with backing up data (change a date stamp, flag, etc)?

    Is there anything I need to be aware of?

    Thank you,

    - CooperT

  2. #2
    Moderator moon-buddy's Avatar
    Join Date
    Aug 2005
    Location
    Somewhere in the US
    Posts
    5,861
    Thanks
    4
    Thanked 228 Times in 223 Posts

    Default

    I don't know exactly what you mean by: "Would enabling Shadow Copy interfere with backing up data (change a date stamp, flag, etc)?".

    MS starts VSS when a backup software is enabled and stops it when the backup is done. I don't know the effect of constantly enabling it. I tried to enable it once but the OS seems to disable it after a few minutes when it realizes that no backup software needs it.
    Last edited by moon-buddy; 05-20-2008 at 08:24 AM.
    Ed

  3. #3
    Senior Member
    Join Date
    Jun 2006
    Posts
    556
    Thanks
    0
    Thanked 15 Times in 14 Posts

    Default

    From version 5.5 TSM can use VSS instead of LVSA for backup open files.
    Before that it uses VSS only for backup System State.

    VSS can't change backup and production data.

    I've 2 issue with VSS:
    - When use VSS you can have enough space for save snapshots. In my case 5-10%
    - If scheduler don't stop after backup ( I use CAD for run it) the "Volume Shdow Copy" services still running and you can see in the dir "System Volume Information" several very, very big files. It can be affect production system. After stop it the files will be deleted.

    Efim

  4. #4
    Member
    Join Date
    Jan 2007
    Posts
    44
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default Let Me Clarify

    I meant enabling Shadow Copy on a share

    http://www.microsoft.com/windows/pro...hadowcopy.mspx

    I know I would have to exclude the sys vol info if I enable shadow copy, but other than that, does it interfer with TSM in any way.

    I may be confused, but I thought Shadow Copy and TSM both use VSS. I dont want to make shadow copies 2x a day, and have it interfer with TSM, so when TSM does its VSS it doesnt get the right files (changed from the last shadow copy, not fromt he last backup).

  5. #5
    Moderator moon-buddy's Avatar
    Join Date
    Aug 2005
    Location
    Somewhere in the US
    Posts
    5,861
    Thanks
    4
    Thanked 228 Times in 223 Posts

    Default

    TSM uses Shadow copy via the VSS functionality. If you enable shadow copy of a shared resource via the scheduler (not to be confused with the TSM Scheduler; I am referring to the Windows scheduler), the files are stored as hidden files and may not be seen by TSM.

    This may or may not interfere with TSM but I suggest you do the Shadow copy outside of the TSM window to avoid "resource clash".
    Last edited by moon-buddy; 05-20-2008 at 10:08 PM.
    Ed

  6. #6
    Senior Member
    Join Date
    Apr 2005
    Location
    Michigan
    Posts
    1,359
    Thanks
    0
    Thanked 2 Times in 2 Posts

    Default

    If I understand this correctly - if VSS is enabled outside TSM - as someone logs into the server or executes TSM client - the shadow copy process pauses so that changes can be made = restarts when completed or logged off. I want to say this may hinder backing up system state of the server. But Id run a backup of systemstate alone to verify.
    Steven Gabriel
    Principal -SGSolutions Inc.
    http://www.sgsolutionsinc.com

  7. #7
    Member
    Join Date
    Jan 2007
    Posts
    44
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default incremental backup - shadowcopy

    So, lets say I run shadow copy on share e:\data at 7:00am and 12:00pm. When TSM runs at 8pm using vss, will it capture files from the last backup (the day before at 8pm), or the last shadow copy? They both use VSS, so I dont want shadow copy affecting the incremental.

Similar Threads

  1. Replies: 3
    Last Post: 07-21-2008, 01:00 PM
  2. Using TSM to Backup DPM Shadow Copy Mount Points
    By mminman in forum Backup / Archive Discussion
    Replies: 0
    Last Post: 04-28-2008, 03:33 PM
  3. No offsite copies?
    By melfaro in forum Tape / Media Library
    Replies: 1
    Last Post: 01-30-2006, 09:49 AM
  4. Failures: TSM 5.2.3, Windows 2003, Journaling, and Volume Shadow Copies
    By Davideg74 in forum Backup / Archive Discussion
    Replies: 1
    Last Post: 11-25-2005, 11:08 AM
  5. Replies: 6
    Last Post: 09-19-2005, 01:43 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •